setGeneric("se.exprs", function(object) standardGeneric("se.exprs"))
##setGeneric("se.exprs<-", function(object, value) standardGeneric("se.exprs<-")) 
setGeneric("weights", function(object) standardGeneric("weights"))
setGeneric("residuals", function(object) standardGeneric("residuals"))
setGeneric("as.ExpressionSet", function(object) standardGeneric("as.ExpressionSet"))
